Weather And Clothing
Costa Rica has two seasons: the dry season, which runs from December to April, and the rainy or green season, which runs from May to November. However, the rainy season is not continuously wet, and you may require a jacket or sweater in some of the dry-season evenings, depending on which of the country’s many microclimates you are visiting.
The North Pacific region (Guanacaste) is the driest side of the country, the Atlantic lowlands (Limón/Puerto Viejo) the wettest.
The Central Valley (San José) is the coolest, due to the altitude. As you are coming to a tropical country, your clothes should be casual, spring and summer wear. Sweaters and light jackets are suggested for higher elevations, such as San José, the volcanoes and Monteverde.